The Serious Error in Relativity

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If I am adding together two vectors that are both 100 in magnitude, but are opposite in direction, their sum is 100 plus 100 equals zero because their directions are oppositely aligned. You'll have to add them up taking into account the direction as well as the magnitude. That's the serious error. But you will still get an answer even if you did it correctly, 100 or hundreds of miles per second.

Welcome to the July 2023 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). We take questions asked by Patreons, whittle them down to a more manageable number -- based primarily on whether I have anything interesting to say about them, not whether the questions themselves are good -- and sometimes group them together if they are about a similar topic.

We're experimenting with a new benefit for Patreon supporters: short video (or audio-only) reflections by me on the podcast that just happened. If you've been wondering whether to join up, this could be the time.

Blog post with questions and transcript: https://www.preposterousuniverse.com/podcast/2023/07/03/ama-july-2023/

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